Overview
' Generally flange connection is used, the general pressure caliber is, the main materials are gray cast iron, ductile iron, carbon steel stainless steel/(etc.), the applicable medium is clean water, suitable for urban construction (water plant), Water conservancy, and other pipelines. The body of the quick exhaust valve is barrel-shaped, and the internal parts of the valve include a stainless steel float, valve stem and valve disc. The valve is installed at the pump outlet or in the water distribution pipeline to eliminate accumulation in the pipeline. to improve the efficiency of the pipeline and water pump. When negative pressure occurs in the pipeline, the valve quickly sucks in outside air to prevent the pipeline from being damaged due to negative pressure. When water begins to be injected into the pipeline, the valve disc is open position, perform a large amount of exhaust. When the air is exhausted, the valve is filled with water, the float rises and drives the valve disc to close, and the exhaust stops. When the water in the pipe is transported normally, if a small amount of air accumulates in the valve to a considerable degree, the water level in the valve drops, and the air is discharged from the small hole at this time. When the water pump stops, the water in the pipe is empty or a negative pressure is generated in the pipe. At this time, the plug opens quickly to suck in air and ensure the safety of the pipeline. The main parts of the medium temperature ℃ are as follows
Part name
Material
Valve body, valve cover
Gray cast iron, ductile iron, ) cast steel
, stainless steel
Plug head
Carbon Steel, steel, stainless steel
Stem
Chrome stainless steel, aluminum bronze
Float
Stainless steel
' Scope of application
' Rapid exhaust Large-diameter exhaust valve is used for exhaust pipes in independent heating systems, central heating systems, heating boilers, central air conditioners, floor heating and solar heating systems. Because there is usually a certain amount of air dissolved in water, and the solubility of air decreases as the temperature increases, the gas gradually separates from the water during the circulation process, and gradually gathers together to form large bubbles or even air columns. Because there is water replenishment, gas is often produced. For this reason, the term exhaust valve is derived, which solves many problems in daily life
'Technical parameters
'. Medium water
. Temperature is normal temperature, maximum ℃
.Valve body cast iron, cast steel
.Float and plug head stainless steel
.Sealing material nitrile rubber
.Valve body test and pressure
.Float and seal test pressure to ensure no leakage
' Working principle
' The rapid exhaust valve uses the buoyancy characteristic principle of water on the stainless steel float. When the water level of the exhaust valve rises, while exhausting, the float is affected by the buoyancy of the water. It floats up automatically until it contacts the sealing surface of the exhaust port. When the pressure reaches a certain level, the ball will automatically close. When the water level in the valve decreases, the ball will fall with the water level. At this time, a large amount of air will be injected into the pipe through the exhaust port. After being installed on the pipe, the inertia of the water on the float is used to automatically open/close the exhaust port. When the pipeline is running, the float stops at the bottom of the ball bowl and performs a large amount of exhaust. When the air in the pipe is exhausted, water rushes into the valve, passes through the ball bowl and then reacts with the float, causing the float to float closed. When the pipeline is operating normally, If a small amount of gas is concentrated in the valve to a considerable extent, the water level in the valve will drop, the float will drop accordingly, and the gas will be discharged from the small hole. If the water pump stops, negative pressure will be generated at any time, the float will drop at any time, and a large amount of air will be sucked to ensure the safety of the pipeline. In the exhaust state, the float pulls down one end of the lever due to gravity. At this time, the lever is in a tilted state, and a gap appears at the contact part between the lever and the exhaust hole. The air is discharged from the exhaust hole through this gap, and as the air When the valve is discharged, the water level rises, the float floats upward under the buoyancy of the water, and the sealing end face on the lever gradually presses against the exhaust hole until the entire exhaust hole is completely blocked, and the exhaust valve is completely closed at this time.
' Advantages
'. The float of the quick exhaust valve is made of low-density material, which will not deform even if it is immersed in high-temperature water for a long time. It will not make it difficult for the float to move.
. The pontoon lever is made of hard plastic, and the connections between the lever, the pontoon and the support are all movable connections, so it will not rust during long-term operation, causing the system to fail to work and cause water leakage.
.The sealing end face of the lever is supported by a spring, which can expand and contract accordingly with the movement of the lever to ensure sealing without exhaust
Beijing Tianzhu Valve Headquarters B-class rapid exhaust valve P41X